Sign-in with Agent

# Sign-in with Agent

SIWA (Sign-In With Agent) authentication for ERC-8004 registered agents.

## Discovery Metadata
- Category: `experimental`
- Framework: `ClawHub`
- Tags: `alpha`, `sign-in`, `agent`, `siwa`, `authentication`, `erc-8004`, `registered`, `agents`

## Agent Execution Policy

This listing is **discovery metadata only**. Canonical instructions are maintained by ClawHub.

### Before Executing Actions

1. **Fetch canonical instructions** from: https://clawhub.ai/skill/siwa
2. **Parse the skill page** for setup, usage, and input/output requirements.
3. **Only proceed** after successfully loading and understanding the full instructions.

### If Fetch Fails

- Return `instruction_unavailable` with reason.
- Do **not** attempt to infer or improvise execution steps from this metadata alone.

## Source

- ClawHub listing: https://clawhub.ai/skill/siwa